CN109973994A - A kind of low NO - Google Patents
A kind of low NO Download PDFInfo
- Publication number
- CN109973994A CN109973994A CN201910265483.0A CN201910265483A CN109973994A CN 109973994 A CN109973994 A CN 109973994A CN 201910265483 A CN201910265483 A CN 201910265483A CN 109973994 A CN109973994 A CN 109973994A
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- combustion air
- fuel
- fuel gas
- low
- spray orifice
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 106
- 239000000446 fuel Substances 0.000 claims abstract description 70
- 239000002737 fuel gas Substances 0.000 claims abstract description 65
- 239000007921 spray Substances 0.000 claims abstract description 33
- 239000003546 flue gas Substances 0.000 claims abstract description 21
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims description 5
- 241000446313 Lamella Species 0.000 claims description 3
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 230000006837 decompression Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 17
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- -1 metallurgy Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/70—Baffles or like flow-disturbing devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2203/00—Gaseous fuel burners
- F23D2203/007—Mixing tubes, air supply regulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2207/00—Ignition devices associated with burner
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/14—Special features of gas burners
- F23D2900/14003—Special features of gas burners with more than one nozzle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/14—Special features of gas burners
- F23D2900/14021—Premixing burners with swirling or vortices creating means for fuel or air
Abstract
The present invention provides a kind of low NO, including shell, shell is formed by fuel section and burning zone are coaxially connected, and fuel gas adapter tube is vertically connected on fuel section outer wall；Combustion air adapter tube is vertically connected on burning zone outer wall, burning zone further includes the fuel gas passageway being connected to fuel section, and low NO further includes igniter, primary fuel gas branch line；Primary fuel gas branch line is connected to fuel gas passageway, and primary fuel spout is opened up on primary fuel branch line；Secondary fuel compression ring gap channel and secondary fuel gas branch line are also connected on the inside of burning zone, several secondary fuel jet pipes are arranged in secondary fuel compression ring gap one end.The air-flow vertical direction toward impact that the present invention is sprayed using the structure recycled in fuel staging and flue gas, combustion air and primary fuel spout, is lighted by altar lamp.At burner outlet, secondary fuel sprays, and burning is added, and high-speed flow or flame form local decompression, low temperature fuel-rich region formed, to reduce NOx。
Description
Technical field
The invention belongs to industrial equipment fields, and in particular to a kind of low NO.
Background technique
As global fossil energy consumption and environmental problem are increasingly significant, energy-saving and emission-reduction have become countries in the world industrialization
The problem of facing is needed in process.For China, Economic Development Mode that is extensive over more than 40 years, disregarding cost is to the energy, ring
Especially huge, energy-saving and emission-reduction arduous task is influenced caused by border.Middle low calorific value gas fuel is widely present in coal production, coalification
In the production process of the industries such as work, petrochemical industry, steel, metallurgy, textile printing and dyeing, such as coke-stove gas, blast furnace gas, coal gas of converter
Deng.And the industrial applied research of centering low calorific value gas fuel is just taken seriously in recent years, this kind of gas heating value is low, but source is wide
General, total amount is huge, strengthens it and recycles with important energy conservation and environment protection significance, is also beneficial to improve energy utilization rate, into
And alleviate China's energy supply and demand contradiction.
With the development of combustion technology, research and development have become China's energy conservation as the burner of fuel using middle low-BTU gas and subtract
One of important topic of row.However for many years, the research of centering low heat value gas fuel burner is concentrated mainly on to burning
In terms of the performance improvement of device, and it is far from enough to the attention rate of nitrogen oxides control aspect in combustion product gases.
With the implementation of newest " atmosphere pollutants emission standards " (GB13223-2011), the whole nation mostly is put into effect policy and is wanted
Seek the NO of gas fired-boilerxDischarge quality concentration is controlled to 30mg/m3(standard state, 3.5%O2) below.And burner conventional at present
Be no longer satisfied newest emission request.In order to meet newest environmental protection standard, it is necessary on existing technical foundation,
R & D design one kind is structurally reasonable, high combustion efficiency, NOxDischarge low gaseous fuel low NO.
Summary of the invention
It is solved in view of the above shortcomings of the prior art with defect it is an object of the invention to disclose a kind of low NO
Burner structure is complicated in the prior art, and efficiency of combustion is low, and partial combustion temperature is high, NOxConcentration of emission high-tech problem.
In order to solve the above-mentioned technical problem, the application, which adopts the following technical scheme that, is achieved: a kind of low NO, packet
Shell is included, the shell is formed by fuel section and burning zone are coaxially connected, is vertically connected with combustion on the fuel section outer wall
Expect gas adapter tube；
Combustion air adapter tube is vertically connected on the burning zone outer wall, the burning zone further includes connecting with fuel section
Logical fuel gas passageway, the low NO further include the igniter being coaxially socketed with shell；
The burning zone further includes several primary fuel gas branched pipes for being arranged radially and being connected to along fuel gas passageway
Road, described primary fuel gas branch line one end are connected to fuel gas passageway, other end closing, each primary fuel branched pipe
Circumferentially bilateral uniformly opens up several primary fuel spouts for road；
Be also connected with secondary fuel compression ring gap channel on the inside of the burning zone, the secondary fuel compression ring gap channel with
Secondary fuel gas branch line is connected between fuel gas passageway, the secondary fuel gas branch line is connected to burning zone
In；
Annulate lamella is arranged far from one end of secondary fuel gas branch line in the secondary fuel compression ring gap channel, described
Ring flat-plate is uniformly arranged in the circumferential direction several secondary fuel jet pipes.
The present invention also has following technical characteristic:
The first round spray orifice, the second round spray orifice and the have circumferentially been evenly arranged on the secondary fuel jet pipe end face
Three round spray orifices, the first round spray orifice, the second round spray orifice and third circle spray orifice and jet pipe axial angle are 15 °, and first
Round spray orifice radially outward rolls tiltedly along ring flat-plate, and the second round spray orifice and third circle spray orifice are radially-inwardly rolled along ring flat-plate
Tiltedly.
The burning zone is connected to by combustion air chamber, combustion air channel with burning cavity, and described is combustion-supporting
Air adapter tube is connected to combustion air chamber.
It is also coaxially arranged in the combustion air chamber to have a combustion air uniform device, the combustion air uniform device by
Equal diameter section and extension diameter section is coaxially connected forms, the equal diameter section is hollow cylinder, and the extension diameter section is hollow round table shape；
The combustion air uniform device is circumferentially arranged several equal chutes.
It there also is provided combustion air swirl-flow devices in the combustion air channel, the combustion air swirl-flow devices are
Double-layer structure is from the inside to the outside level-one swirl vane and second level swirl vane, the level-one swirl vane and second level eddy flow leaf
The circulation area ratio of piece is 2~3:7~8, and level-one swirl vane, second level swirl vane and axial angle are 30 °；
The combustion air swirl-flow devices and the second fuel gas passageway are socketed, the outer diameter of combustion air swirl-flow devices with help
Combustion air duct internal diameter is same size.
Flue gas recirculation interface is also connected in the combustion air chamber.
The secondary fuel compression ring gap channel is equipped with baffle in one end close to combustion air uniform device.
The igniter includes the altar lamp and flame monitoring apparatus being arranged side by side, and igniter is logical through fuel gas
Road.
It is provided with high-energy firing gun in the altar lamp, the altar lamp end is flared structure, on horn mouth
It is circumferential to be evenly distributed with several circular holes.
Compared with prior art, the present invention beneficial has the technical effect that
(I) present invention is revolved using the structure recycled in fuel staging and flue gas, whole combustion airs by swirl-flow devices
After stream, the air-flow vertical direction toward impact sprayed with primary fuel spout, the air-flow after being sufficiently mixed is burned device center altar lamp and lights.
At burner outlet, burning, high-speed flow or flame-shaped is added by secondary fuel spout high speed ejection in a large amount of secondary fuel
At local decompression, flue gas volume is generated inside boiler furnace and sucks back stream, forms low temperature fuel-rich region, ignition temperature is also much low at this time
In 1500 DEG C, to reduce NOx。
(II) present invention additionally uses the structure of flue gas outer circulation, and a part smoke evacuation is returned to by flue gas recirculation interface
It in combustion air chamber, is mixed with combustion air, reduces the oxygen concentration of combustion air, to reduce combustion intensity, returned simultaneously
Flue gas can be absorbed a part of heat, ignition temperature is reduced, to inhibit the generation of nitrogen oxides.
Detailed description of the invention
Fig. 1 is schematic cross-sectional view of the present invention.
Fig. 2 is right view structural schematic diagram of the present invention.
Fig. 3 is primary fuel gas branch pipe schematic cross-sectional view.
Fig. 4 is secondary fuel gas blowout pipe end configuration schematic diagram.
Fig. 5 is combustion air uniform device structural schematic diagram.
Fig. 6 is combustion air swirl-flow devices structural schematic diagram.
The meaning of each label in figure are as follows: 1- shell, 2- fuel section, 3- burning zone, 4- fuel gas adapter tube, 5- combustion air
Adapter tube, 6- fuel gas passageway, 7- igniter, 8- primary fuel gas branched pipe, 9- primary fuel spout, 10- secondary fuel gas
Annular space channel, 11- secondary fuel gas branch line, 12- ring flat-plate, 13- secondary fuel jet pipe, the round spray orifice of 14- first, 15- the
Two round spray orifices, 16- third circle spray orifice, 17- combustion air chamber, 18- combustion air channel, 19- burning cavity, 20- are helped
Fire air uniform device, the equal diameter section of 21-, 22- extension diameter section, the equal chute of 23-, 24- combustion air swirl-flow devices, 25- level-one eddy flow leaf
Piece, 26- second level swirl vane, 27- flue gas recirculation interface, 28- baffle, 29- altar lamp, 30- flame monitoring apparatus, 31- high
It can burning torch.
Explanation is further explained in detail to particular content of the invention below in conjunction with drawings and examples.
Specific embodiment
Specific embodiments of the present invention are given below, it should be noted that the invention is not limited to implement in detail below
Example, all equivalent transformations made on the basis of the technical solutions of the present application each fall within protection scope of the present invention.
Embodiment:
In compliance with the above technical solution, as shown in Figures 1 to 6, the present embodiment provides a kind of low NO, including shell 1,
Shell 1 is by fuel section 2 and burning zone 3 is coaxially connected forms, and is vertically connected with fuel gas adapter tube 4 on 1 outer wall of fuel section；Fuel gas
Adapter tube is for being passed through fuel gas.
Combustion air adapter tube 5 is vertically connected on 3 outer wall of burning zone, burning zone 3 further includes the fuel being connected to fuel section 2
Gas channel 6, low NO further include the igniter 7 being coaxially socketed with shell 1；Combustion air is taken over for being passed through combustion-supporting sky
Gas, fuel gas passageway convey fuel gas, and igniter is for lighting a fire.
Burning zone 3 further includes several primary fuel gas branch lines 8 for being arranged radially and being connected to along fuel gas passageway 6,
8 one end of primary fuel gas branch line is connected to fuel gas passageway 6, other end closing, edge on each primary fuel branch line 8
Circumferential bilateral uniformly opens up several primary fuel spouts 9；A part of fuel gas enters primary fuel gas by fuel gas passageway
Then branch line is sprayed by primary fuel spout, participate in burning.
Secondary fuel compression ring gap channel 10, secondary fuel compression ring gap channel 10 and fuel gas are also connected on the inside of burning zone 3
Secondary fuel gas branch line 11 is connected between channel 6, secondary fuel gas branch line 11 is connected in burning zone 3；
Annulate lamella 12, ring flat-plate 12 is arranged far from one end of secondary fuel gas branch line 11 in secondary fuel compression ring gap channel 10
It is uniformly arranged in the circumferential direction several secondary fuel jet pipes 13.Another part fuel gas enters secondary fuel gas point by fuel gas passageway
Bye-pass sprays behind secondary fuel compression ring gap channel from secondary fuel jet pipe, participates in burning.
Preferably, secondary fuel jet pipe has circumferentially been evenly arranged the first circular jetting on 13 end face to one kind as the present embodiment
The round spray orifice 15 in hole 14, second and third circle spray orifice 16, the first round spray orifice 15 of round spray orifice 14, second and third circular jetting
Hole 16 and jet pipe axial angle are 15 °, and the first round spray orifice 14 radially outward rolls tiltedly along ring flat-plate 12, the second round spray orifice
15 and third circle spray orifice 16 radially-inwardly rolled along ring flat-plate 12 tiltedly.
When fuel gas is from circular spout high speed ejection, the flue gas around inhaling can be rolled up, ignition temperature is can reduce, avoids burning
The formation of local high temperature zone in the process.
First round spray orifice radially outward rolls tiltedly along ring flat-plate, plays disperses combustion, avoid the formation of locally it is violent,
High-temp combustion region.
Second round spray orifice and third circle spray orifice radially-inwardly roll tiltedly along ring flat-plate, are injected directly into secondary fuel gas
On the one hand central burner region plays a part of to stablize burning, burning, energy is added in the flue gas around the volume suction of another aspect high-speed flow
Combustion centre's temperature is enough reduced, to avoid the formation of local high temperature zone.
Preferably, burning zone 3 is by combustion air chamber 17, combustion air channel 18 and combustion chamber for one kind as the present embodiment
Body 19 is connected to, and combustion air adapter tube 5 is connected to combustion air chamber 17.
One kind as the present embodiment is preferably, also coaxially arranged in combustion air chamber 15 to have combustion air uniform device 20,
Combustion air uniform device 20 is by equal diameter section 21 and extension diameter section 22 is coaxially connected forms, and equal diameter section 23 is hollow cylinder, extension diameter section
22 be hollow round table shape；
Combustion air uniform device 20 is circumferentially arranged several equal chutes 23.
Combustion air uniform device is uniformly distributed circumferentially combustion air into combustion-supporting sky by combustion air chamber
In gas channel, prevents combustion air to be directly entered in combustion air channel by entrance side, combustion air is caused seriously to be unevenly distributed
It is even, to influence the mixing with primary fuel gas；Another aspect makes to return the flue gas recycled in combustion air chamber circumferentially
It is uniformly distributed and enters in combustion air channel, be sufficiently mixed flue gas recycled with combustion air, avoid flue gas recycled and help
Combustion air directly liquidates, and causes air flow method uneven.
One kind as the present embodiment preferably there also is provided combustion air swirl-flow devices 24, help in combustion air channel 18
Combustion air swirling device 24 is double-layer structure, is from the inside to the outside level-one swirl vane 25 and second level swirl vane 26, level-one eddy flow
The circulation area ratio of blade 25 and second level swirl vane 26 is 2~3:7~8, level-one swirl vane 25, second level swirl vane 26 with
Axial angle is 30 °；
On the one hand combustion air swirl-flow devices main function is the cyclonic action using swirl vane, pass through combustion air
Stronger rotation is generated after swirl vane, to reinforce its mixing with fuel gas；It on the other hand is according to two-stage swirl vane
Area ratio, combustion air is divided into level-one combustion air and second level combustion air, make combustion air in different forms and when
Between with primary fuel gas be mixed and burned.
Combustion air swirl-flow devices 24 and the second fuel gas passageway 10 are socketed, the outer diameter of combustion air swirl-flow devices 24 with help
Combustion 18 internal diameter of air duct is same size.
One kind as the present embodiment is preferably also connected with flue gas recirculation interface 27 in combustion air chamber 17.
A part smoke evacuation is returned in combustion air chamber by flue gas recirculation interface, is mixed with combustion air, is reduced
The oxygen concentration of combustion air reduces burning temperature so that a part of heat can be absorbed in the flue gas for reducing combustion intensity, while returning
Degree, to inhibit the generation of nitrogen oxides.
Preferably, secondary fuel compression ring gap channel 10 is close to the one of combustion air uniform device 20 for one kind as the present embodiment
End is equipped with baffle 28.Baffle with combustion air chamber to be separated.
Preferably, igniter 7 includes the altar lamp 29 and flame monitoring apparatus being arranged side by side to one kind as the present embodiment
30, igniter 7 runs through fuel gas passageway 6.
One kind as the present embodiment preferably, is provided with high-energy firing gun 31 in altar lamp 29,30 end of altar lamp is loudspeaker
Shape structure is circumferentially evenly distributed with several circular holes on horn mouth.
Flame monitoring apparatus 30 for being monitored in real time to the flame of altar lamp 9 in burner, and with entire burner
System carries out safety interlocking control.When there is burner ignition failure, in burner hearth altar lamp put out a fire suddenly etc. abnormal operating condition when,
The signal lamp of flame detecting device 30 can extinguish, and feed back to central control system.System passes through chain control, insantaneous break combustion
Expect gas supply, it is ensured that system safety.
Wherein, fuel gas uses coke-stove gas.
Wherein, combustion air excess air coefficient is 1.3~1.4.
Wherein, primary fuel and secondary fuel distribution ratio are 30~40%:60~70%.
Wherein, flue gas recycled amount is the 15~25% of total exhaust gas volumn.
The specific work process of the present embodiment are as follows:
Coke-stove gas divides two-stage to feed participation burning from fuel gas main channel and secondary fuel compression ring gap channel respectively, combustion-supporting
Air is all supplied by combustion air channel.A part smoke evacuation returns to combustion air chamber by flue gas recirculation (FGR) interface
It in body, is mixed with combustion air, reduces the oxygen concentration of combustion air, to reduce combustion intensity, while the flue gas returned can be with
A part of heat is absorbed, ignition temperature is reduced, to inhibit the generation of nitrogen oxides.
Fuel gas stream of whole combustion airs after combustion air swirl-flow devices eddy flow, with the ejection of primary fuel spout
Vertical direction toward impact, the air-flow after being sufficiently mixed are burned device center altar lamp and light.Primary fuel is burning with whole combustion airs
Device is centrally formed oxygen-enriched fuel-poor region, although combustion air excess coefficient is very big herein, due to fuel quantity very little, so herein
Ignition temperature is far below 1500 DEG C, so that a large amount of NO will not be formedx.At burner outlet, a large amount of secondary fuel is by two
Burning is added in grade fuel nozzle ports high speed ejection, and high-speed flow forms local decompression, and flue gas volume is generated inside boiler furnace and is sucked back
Stream forms low temperature fuel-rich region, and ignition temperature is also well below 1500 DEG C at this time, so that a large amount of NO will not be formedx, to protect
Demonstrate,prove burner outlet NOxDischarge quality concentration is less than 30mg/m3, meet newest environmental requirement.
Claims (9)
1. a kind of low NO, including shell (1), the shell (1) is coaxially connected by fuel section (2) and burning zone (3)
It forms, fuel gas adapter tube (4) is vertically connected on the fuel section (1) outer wall；
Combustion air adapter tube (5) is vertically connected on described burning zone (3) outer wall, the burning zone (3) further includes and fires
Expect that the fuel gas passageway (6) of section (2) connection, the low NO further include the igniter being coaxially socketed with shell (1)
(7)；
It is characterized in that, the burning zone (3) further includes several level-ones for being arranged radially and being connected to along fuel gas passageway (6)
Fuel gas branch line (8), described primary fuel gas branch line (8) one end are connected to fuel gas passageway (6), another end seal
It closes, circumferentially bilateral uniformly opens up several primary fuel spouts (9) on each primary fuel branch line (8)；
Secondary fuel compression ring gap channel (10) is also connected on the inside of the burning zone (3), the secondary fuel compression ring gap is logical
Secondary fuel gas branch line (11), the secondary fuel gas branched pipe are connected between road (10) and fuel gas passageway (6)
Road (11) is connected in burning zone (3)；
Annulate lamella is arranged far from one end of secondary fuel gas branch line (11) in the secondary fuel compression ring gap channel (10)
(12), the ring flat-plate (12) is uniformly arranged in the circumferential direction several secondary fuel jet pipes (13).
2. low NO as described in claim 1, which is characterized in that along circle on described secondary fuel jet pipe (13) end face
It has been evenly arranged the first round spray orifice (14), the second round spray orifice (15) and third circle spray orifice (16), the first round spray orifice week
(14), the second round spray orifice (15) and third circle spray orifice (16) and jet pipe axial angle are 15 °, the first round spray orifice (14)
It is radially outward rolled along ring flat-plate (12) tiltedly, the second round spray orifice (15) and third circle spray orifice (16) are radial along ring flat-plate (12)
It tilts inwardly.
3. low NO as described in claim 1, which is characterized in that the burning zone (3) is by combustion air chamber
(17), combustion air channel (18) are connected to burning cavity (19), the combustion air adapter tube (5) and combustion air chamber
Body (17) connection.
4. low NO as claimed in claim 3, which is characterized in that also coaxial cloth in the combustion air chamber (15)
It is equipped with combustion air uniform device (20), the combustion air uniform device (20) is coaxially connected by equal diameter section (21) and extension diameter section (22)
It connects, the equal diameter section (23) is hollow cylinder, and the extension diameter section (22) is hollow round table shape；
The combustion air uniform device (20) is circumferentially arranged several equal chutes (23).
5. low NO as claimed in claim 3, which is characterized in that there also is provided in the combustion air channel (18)
Combustion air swirl-flow devices (24), the combustion air swirl-flow devices (24) are double-layer structure, are from the inside to the outside level-one eddy flow
Blade (25) and second level swirl vane (26), the circulation area of the level-one swirl vane (25) and second level swirl vane (26)
Than for 2~3:7~8, level-one swirl vane (25), second level swirl vane (26) and axial angle are 30 °；
The combustion air swirl-flow devices (24) and the second fuel gas passageway (10) are socketed, combustion air swirl-flow devices (24)
Outer diameter and combustion air channel (18) internal diameter are same size.
6. low NO as claimed in claim 3, which is characterized in that be also connected in the combustion air chamber (17)
Flue gas recirculation interface (27).
7. low NO as described in claim 1, which is characterized in that the secondary fuel compression ring gap channel (10) is being leaned on
One end of nearly combustion air uniform device (20) is equipped with baffle (28).
8. low NO as described in claim 1, which is characterized in that the igniter (7) includes being arranged side by side
Altar lamp (29) and flame monitoring apparatus (30), igniter (7) run through fuel gas passageway (6).
9. low NO as claimed in claim 8, which is characterized in that be provided with high-energy ignition in the altar lamp (29)
Rifle (31), the altar lamp (30) end are flared structure, are circumferentially evenly distributed with several circular holes on horn mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910265483.0A CN109973994B (en) | 2019-04-03 | 2019-04-03 | Low-nitrogen burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910265483.0A CN109973994B (en) | 2019-04-03 | 2019-04-03 | Low-nitrogen burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109973994A true CN109973994A (en) | 2019-07-05 |
| CN109973994B CN109973994B (en) | 2023-12-29 |
Family
ID=67082658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910265483.0A Active CN109973994B (en) | 2019-04-03 | 2019-04-03 | Low-nitrogen burner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110425523A (en) * | 2019-07-23 | 2019-11-08 | 西安航天源动力工程有限公司 | A kind of multiinjector alcohol radical burner |
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| CN109973994B (en) | 2023-12-29 |
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